TY - JOUR

T1 - A comparative study of glass-forming ability, crystallization kinetics and mechanical properties of Zr55Co25Al20 and Zr52Co25Al23 bulk metallic glasses

AU - Dong, Q.

AU - Pan, Y.

AU - Tan, J.

AU - Qin, X.M.

AU - Li, C.J.

AU - Gao, P.

AU - Feng, Z.X.

AU - Calin, Mariana

AU - Eckert, Jürgen

PY - 2019/1/17

Y1 - 2019/1/17

N2 - Most bulk metallic glass systems with high glass-forming ability are doped with precious metal(s) or toxic element(s), like palladium and beryllium, leading to relatively high cost or low safety in use. In this work, the glass-forming ability, crystallization kinetics and mechanical properties of the Zr 55Co 25Al 20 and Zr 52Co 25Al 23 bulk metallic glasses prepared by water-cooled copper mold suction casting are investigated in detail. The results show that Zr 52Co 25Al 23 has a wider supercooled liquid region, a higher thermal stability and a higher glass-forming ability than the Zr 55Co 25Al 20 amorphous alloy. At the same time, Zr 52Co 25Al 23 has a higher activation energy of crystallization than Zr 55Co 25Al 20 amorphous alloy, indicating that Zr 52Co 25Al 23 has a higher resistance to crystallization than Zr 55Co 25Al 20. Investigation of the mechanical properties reveals that Zr 52Co 25Al 23 also has a higher fracture strength of up to 2308 MPa and a higher specific fracture strength of up to 3.78 × 10 5 N m kg −1 compared with 316L stainless steel, Ti-6Al-4V, as well as Mg-, Ti-, and other Zr-based BMGs.

AB - Most bulk metallic glass systems with high glass-forming ability are doped with precious metal(s) or toxic element(s), like palladium and beryllium, leading to relatively high cost or low safety in use. In this work, the glass-forming ability, crystallization kinetics and mechanical properties of the Zr 55Co 25Al 20 and Zr 52Co 25Al 23 bulk metallic glasses prepared by water-cooled copper mold suction casting are investigated in detail. The results show that Zr 52Co 25Al 23 has a wider supercooled liquid region, a higher thermal stability and a higher glass-forming ability than the Zr 55Co 25Al 20 amorphous alloy. At the same time, Zr 52Co 25Al 23 has a higher activation energy of crystallization than Zr 55Co 25Al 20 amorphous alloy, indicating that Zr 52Co 25Al 23 has a higher resistance to crystallization than Zr 55Co 25Al 20. Investigation of the mechanical properties reveals that Zr 52Co 25Al 23 also has a higher fracture strength of up to 2308 MPa and a higher specific fracture strength of up to 3.78 × 10 5 N m kg −1 compared with 316L stainless steel, Ti-6Al-4V, as well as Mg-, Ti-, and other Zr-based BMGs.

UR - http://www.scopus.com/inward/record.url?scp=85060299657&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2019.01.180

DO - 10.1016/j.jallcom.2019.01.180

M3 - Article

VL - 785.2019

SP - 422

EP - 428

JO - Journal of alloys and compounds

JF - Journal of alloys and compounds

SN - 0925-8388

IS - 15 May

ER -